The Wii has a virtual console shop which has a lot of emulated games from over the years (including the sonics etc)

I *believe* you will only find Mario 1 in the molested format on the Super Mario Allstars version which is a "remastered" version that was on Super Nintendo (ie, the one with Lost worlds).

They changed the music, jazzed it up a bit and it lost a bit of the charm. Particularly if your emotional hook is with the NES version.

The interesting/lame thing about the Wii Virtual Console shop is that they do not molest the graphics in any way. Say you play Donkey Kong Country on an emulator, you can generally smooth it out to get it onto higher res of these days to the point where it looks pretty decent. Just some basic filtering to fix up the jump to higher res.

You then go buy it on Virtual Console on Wii and you'll be playing with the original (and quite awful) jagged resolution blown up on your large TV.

But emulator.. meh, playing console games on computer is a lot like playing computer (fps for example) games on a console... a diminished experience.